David Morrissey just made a big return to
"The Walking Dead" as the menacing Governor character this past weekend. Monday night (Nov. 18) on
"Conan," he says people love to hate him -- and that the show kind of ruined "Mad Men" for him.

"People run up to me all the time and say, 'I hope you die soon' and I take it as a compliment," says Morrissey. "I was in the post office once and there was a woman in front of me waiting in line and she turned around and saw my face and dropped to the floor, said 'Oh my god, I hate you' and she ran out. ... That's a great reaction."

He goes on to say that the "Walking Dead" cast and crew aren't messing around -- they're filming in the blood and the guts and the Atlanta humidity.

"The show is about people who are really up against it and in this terrible world. ... The show, for me, has ruined 'Mad Men.' I used to love watching 'Mad Men,' but now I watch it and I think 'There you in your air-conditioned studio, in your nice suit, drinking' and I think, 'How can you pick your check up at the end of the week?'" he cracks. "Come on our show for a week."

And would Morrissey ever want to be a zombie?

"If you're a zombie, if you ever see the makeup team do the Plaster of Paris for your zombie makeup then you're really running out of there. I don't ever want to be a zombie, I love being the Governor," says Morrissey, adding that he likes that the show isn't afraid to kill off its characters.

"I like the fact that it's a show that kills off its actors, though. It's not like a 'Star Trek' show where you've got four guys beaming down and there's one guy you've never seen before and you know he's not making it back to the Enterprise. ... No one is safe on our show and that's the way we like it."